
<template>
  <div :id="id" :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import * as echarts from "echarts";
export default {
  name: "echart",
  props: {
    className: {
      type: String,
      default: "chart",
    },
    id: {
      type: String,
      default: "chart",
    },
    width: {
      type: String,
      default: "100%",
    },
    height: {
      type: String,
      default: "100%",
    },
    options: {
      type: Object,
      default: () => ({}),
    },
  },
  data() {
    return {
      chart: null,
    };
  },
  watch: {
    options: {
      handler(options) {
        // 设置true清空echart缓存
        this.chart.setOption(options, true);
      },
      deep: true,
    },
  },
  mounted() {
    this.initChart();
    window.addEventListener("resize", this.handleResize); // 添加resize 事件监听器
  },
  beforeDestroy() {
    window.removeEventListener("resize", this.handleResize); // 移除resize 事件监听器
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart() {
      // 初始化echart
      this.chart = echarts.init(this.$el);
      this.chart.setOption(this.options, true);
    },
    //根据屏幕自动缩放
    handleResize() {
      if (this.chart) {
        this.chart.resize(); // 调用ECharts的resize方法
      }
    },
  },
};
</script>

<style>
</style>
